package org.zxp.javacheck.hash;

/**
 * @program: effectiveJava
 * @description:
 * @author: X-Pacific zhang
 * @create: 2021-06-23 02:28
 **/
public class HashTest {
    public static void main(String[] args){
        String a = "123";
        String b = "1" + "23";
        String c = "12345".substring(0,3);
        System.out.println(a.hashCode());
        System.out.println(b.hashCode());
        System.out.println(c.hashCode());

        Integer aa = 0;
        System.out.println(aa.equals(null));
    }
}
